Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2edda9933bebf8f…

MALICIOUS

PDF

94.7 KB Created: 2021-07-01 20:49:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 517268c4d68d9e232d36bde9a7f1a88a SHA-1: f5e2685843afaa6d4b8cb3bde13ef14d7213f4e6 SHA-256: f2edda9933bebf8fd135446fc5dce27295a034e248bc6cee4d72b56eee2d5199
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by multiple heuristics as malicious, including a high-confidence ML classifier and ClamAV detection. It functions as a link farm, directing users to various compromised websites and potentially malicious URLs. The presence of multiple external URIs and link farm indicators suggests an attempt to distribute malware or conduct phishing attacks. No scripts were extracted, but the overall structure and URL patterns are indicative of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9929

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://crewmak.ru/uplcv?utm_term=ana+with+reflex+to+titer+positive
    • http://www.magicapro.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607522ce77bc3---32850867543.pdf
    • https://nexusmediation.nl/files/30630756931.pdf
    • https://trucraftsmanship.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083c83656393---62163979100.pdf
    • http://ackerviewguesthouse.com/userfiles/file/jatuxereseruroxena.pdf
    • http://creativeindustries.ru/uploads/userfiles/file/31647264370.pdf
    • https://agatanorek.com/files/file/17600871394.pdf
    • https://comesa.com.pe/wp-content/plugins/super-forms/uploads/php/files/oubsn230tpt9u3r71099692tc6/kefavidivije.pdf
    • https://laps.pl/userfiles/file/55254808585.pdf
    • http://abogarestudio.com/userfiles/file/tobirozalapusesufunopi.pdf
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/1606fd2c865838---jubus.pdf
    • https://krimgranit.ru/wp-content/plugins/super-forms/uploads/php/files/6db8267f9d91d08c93a448a1be708fa4/92185338751.pdf
    • https://fruitssupplier.com/app/webroot/img/files/lojabebawatoxurun.pdf
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/d854054d710d2596bde24d795fcefab4/zefelosedupikan.pdf
    • https://doitsolutions.co/wp-content/plugins/super-forms/uploads/php/files/a425da698049d6e7af876b472dc21254/womanabejadimub.pdf
    • http://for-rent-antwerp.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b1854769566---dezoriwopiridekew.pdf
    • http://thamdinhgiadaiquang.com/img/files/kuvevudijevagowavuxiwiv.pdf
    • https://www.gs-gleichmann.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b50f59cc903---bedumorukezeboti.pdf
    • https://www.jscorporation.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/1608e6626cdd69---baxad.pdf
    • http://bidmitt.com/img/files/file/71669301417.pdf
    • https://cruiseship.cruises/wp-content/plugins/super-forms/uploads/php/files/vme6s8pl2ivooj67tnur5722c9/getukugotixejofisojizu.pdf
    • https://ankaratemizlikcim.com/depo/sayfaresim/file/74340151644.pdf
    • http://www.segurosfacility.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160805a293991b---211856644.pdf
    • http://amirafouad.com/uploaded_files/file/73854932060.pdf
    • http://churchliferesources.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608eb0df5a476---vunosebatanusuxarazupude.pdf
    • https://kurek-rowery.pl/user_pict/file/zesosijuxuwigafutetiw.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010cf6.bin
13c49f4775f08e603f7be269bf82dfbb6455979f2a1b4c898571a532f75b7d6b
pdf-font-stream PDF embedded font (sfnt) at offset 0x10CF6 18088 bytes
font_01_sfnt_off00013c87.bin
7ad5d23d7f507cc628a88aac16097e01a3000384a983d3fda9aff3f7cffcfefe
pdf-font-stream PDF embedded font (sfnt) at offset 0x13C87 10692 bytes
font_02_sfnt_off0001551d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1551D 16792 bytes